package com.jinxin.platform.cdsideparkmgr.utils;

/**
 * All rights Reserved, Designed By www.beonelot.com
 *
 * @version: V1.0
 * @Copyright: www.beonelot.com Inc. All rights reserved.
 * @Description：
 * @Date: 2021-11-09
 * @Author: Lingnan
 **/

import com.alibaba.fastjson.JSONObject;
import com.jinxin.platform.cdsideparkmgr.common.Constant;
import com.jinxin.platform.cdsideparkmgr.redis.RedisUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

/**
 * 获取token类
 */
//@Service
@Slf4j
public class LicensePlateService {
    @Autowired
    private RedisUtil redisUtil;
    @Value("${cdsideparkmgr.baiduapi.ak}")
    private String ak;
    @Value("${cdsideparkmgr.baiduapi.sk}")
    private String sk;

    public String licensePlate(String imgPath) {
        // 请求url
        String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/license_plate";
        try {
            byte[] imgData = FileUtil.readFileByBytes(imgPath);
            String imgStr = Base64Util.encode(imgData);
            String imgParam = URLEncoder.encode(imgStr, "UTF-8");

            String param = "image=" + imgParam;

            // 注意这里仅为了简化编码每一次请求都去获取access_token，线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。
            String accessToken = getAuth();

            String result = HttpUtil.post(url, accessToken, param);
            System.out.println(result);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 获取权限token
     * @return 返回示例：
     * {
     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     * "expires_in": 2592000
     * }
     */
    public String getAuth() {
        if(redisUtil.hasKey(Constant.REDIS_KEY_TOKEN)){
            return (String) redisUtil.get(Constant.REDIS_KEY_TOKEN);
        }
        return getAuth(this.ak, this.sk);
    }

    /**
     * 获取API访问token
     * 该token有一定的有效期，需要自行管理，当失效时需重新获取.
     * @param ak - 百度云官网获取的 API Key
     * @param sk - 百度云官网获取的 Securet Key
     * @return assess_token 示例：
     * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"
     */
    public String getAuth(String ak, String sk) {
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + ak
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + sk;
        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            log.info("getAuth result:" + result);
            JSONObject jsonObject = JSONObject.parseObject(result);
            String accessToken = jsonObject.getString("access_token");
            if(!StringUtil.isEmpty(accessToken)){
                //  Access Token的有效期(秒为单位，有效期30天 2592000秒，适当提前)；
                redisUtil.set(Constant.REDIS_KEY_TOKEN,accessToken,2590000L);
                return accessToken;
            }
        } catch (Exception e) {
            log.error("获取token失败！{}",e.toString());
        }
        return null;
    }

}
